1. getWindowById(id) add undefined check

2. IpcMain add off

ElectronNET.API/ElectronNET.API.csproj

@@ -16,6 +16,7 @@ This package contains the API to access the "native" electron API.</Description>
     <PackageTags>electron aspnetcore</PackageTags>
     <PackageReleaseNotes>Changelog: https://github.com/ElectronNET/Electron.NET/blob/master/Changelog.md</PackageReleaseNotes>
     <PackageIconUrl>https://raw.githubusercontent.com/ElectronNET/Electron.NET/master/assets/images/electron.net-logo-square.png</PackageIconUrl>
+    <Version>1.0.1</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">

ElectronNET.API/IpcMain.cs

@@ -46,6 +46,7 @@ namespace ElectronNET.API
         public void On(string channel, Action<object> listener)
         {
             BridgeConnector.Socket.Emit("registerIpcMainChannel", channel);
+            BridgeConnector.Socket.Off(channel);
             BridgeConnector.Socket.On(channel, (args) => 
             {
                 List<object> objectArray = FormatArguments(args);